这篇文章本来是不打算发的，因为网上教程太多了，而且都大同小异。今天在做笔记时突然想起来，觉得还是发出来，希望能对其他遇到相同问题的人有所帮助。
获取Flutter SDK
第一步
git clone -b beta https://github.com/flutter/flutter.git
export PATH= PATH_TO_FLUTTER_GIT_DIRECTORY/flutter/bin:$PATH
export ANDROID_HOME="/Users/用户名/Documents/android_sdk" //android sdk目录，替换为你自己的即可
export PATH=${PATH}:${ANDROID_HOME}/tools
export PATH=${PATH}:${ANDROID_HOME}/platform-tools
export PUB_HOSTED_URL=https://pub.flutter-io.cn //国内用户需要设置
export FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn //国内用户需要设置
注意：__ PATH_TO_FLUTTER_GIT_DIRECTORY __为你flutter的路径，比如“~/document/code”
第二步
- 运行 source .profile 刷新当前终端窗口.
- 执行
echo $PATH，查看环境变量是否添加成功
第三步（运行Flutter）
flutter doctor
注意：这里可能会提示有错，比如：
1、Android SDK 路径有误，或者ANDROID_HOME环境变量没设置
[-] Android toolchain - develop for Android devices
• Android SDK at /Users/obiwan/Library/Android/sdk
✗ Android SDK is missing command line tools; download from https://goo.gl/XxQghQ
• Try re-installing or updating your Android SDK,
visit https://flutter.io/setup/#android-setup for detailed instructions.
2、报 Downloaded executables cannot execute on host. 错误，同时也给出了解决方案
1、在Debian/Ubantu/Mint上，执行 sudo apt-get install lib32stdc++6
2、在Fedora上，执行 dnf install libstdc++.i686
3、在Arch上，执行 pacman -S lib32-libstdc++5
查了一下，出现这个错误是因为在64位的机器上无法执行32位的文件，所以需要安装个兼容库？？
然而在安装的过程中也出现了问题（后来切换到root上安装又可以了，什么鬼？）
3、 Some Android licenses not accepted 错误，解决方案也给出了
执行 flutter doctor --android-licenses，然后全部接受协议即可
4、 Flutter plugin not installed，Dart plugin not installed 错误，打开Android studio装上就完了
5、提示没安装Android studio，给Flutter指定Android Studio的安装路径即可，例如执行flutter config --android-studio-dir=/<user name>/Android Studio
注意，每次安装完确实的依赖后都执行 Flutter doctor 查看是否安装成功
附两个学习网站：
https://flutter.dev/docs/get-started/install
https://flutterchina.club
更新 2019.04.18
配置IOS开发环境
1、安装Xcode
2、安装brew（如果mac上没有安装的话）
2、执行flutter doctor，按提示执行响应的命令，如
**✗**** libimobiledevice and ideviceinstaller are not installed. To install with**
** Brew, run:**
** brew update**
** brew install --HEAD usbmuxd**
** brew link usbmuxd**
** brew install --HEAD libimobiledevice**
** brew install ideviceinstaller**
**✗**** ios-deploy not installed. To install with Brew:**
** brew install ios-deploy**
**✗**** Brew can be used to install tools for iOS device development.**
** Download brew at [https://brew.sh/.](https://brew.sh/)**
期间，可能会出现
chenwenhuideMacBook-Pro:~ chenwenhui$ brew install --HEAD libimobiledevice
Updating Homebrew...
==> Cloning https://git.libimobiledevice.org/libimobiledevice.git
Cloning into '/Users/chenwenhui/Library/Caches/Homebrew/libimobiledevice--git'...
fatal: unable to access 'https://git.libimobiledevice.org/libimobiledevice.git/': LibreSSL SSL_read: SSL_ERROR_SYSCALL, errno 54
Error: An exception occurred within a child process:
DownloadError: Failed to download resource "libimobiledevice"
Failure while executing; `git clone --branch master https://git.libimobiledevice.org/libimobiledevice.git /Users/chenwenhui/Library/Caches/Homebrew/libimobiledevice--git` exited with 128\. Here's the output:
Cloning into '/Users/chenwenhui/Library/Caches/Homebrew/libimobiledevice--git'...
fatal: unable to access 'https://git.libimobiledevice.org/libimobiledevice.git/': LibreSSL SSL_read: SSL_ERROR_SYSCALL, errno 54
解决办法：翻墙，更新brew 软件源，多试几次
解决之后，在执行flutter doctor，按提示执行响应命令
**✗**** ios-deploy not installed. To install with Brew:**
** brew install ios-deploy**
**✗**** CocoaPods not installed.**
** CocoaPods is used to retrieve the iOS platform side's plugin code that**
** responds to your plugin usage on the Dart side.**
** Without resolving iOS dependencies with CocoaPods, plugins will not work**
** on iOS.**
** For more info, see https://flutter.io/platform-plugins**
** To install:**
** brew install cocoapods**
** pod setup**
安装完后，在执行flutter doctor
